]]>22347Mon, 15 Jan 2018 01:36:03 +0000Hyperstudy - Design Parameters with Boolean Logichttp://forum.altairhyperworks.com/index.php?/topic/22352-hyperstudy-design-parameters-with-boolean-logic/
In the expression builder within hyperstudy, is there anyway to apply boolean logic? I could really do with adding IF statements. I've looked to the functions tab and there doesn't appear to be an option.

]]>22352Mon, 15 Jan 2018 11:36:24 +0000How to import 'Design variable'(topology or free shape) of optistruct to hyperstuy?http://forum.altairhyperworks.com/index.php?/topic/22368-how-to-import-design-variabletopology-or-free-shape-of-optistruct-to-hyperstuy/
Hi, I'm using optistruct 'free shape' to create 'design variable' and saved as a .hm file. How to import this variable into Hyperstudy as a 'Define design variables'?

Am trying to understand hyperstudy using Shapes and I have encountered a bit of a headscratcher.

My plate has a hole with a radius of 50mm and I want to examine the effects of changing that radius. When I apply a shape to it and get to hyperstudy it asks me for an upper and lower bound (default -1 and 1) and an initial of 0. My question is, what exactly do these numbers relate to? When I run it creates a hole 37.5mm and 62.5mm radius respectively, but how does that relate to lower and upper bounds of -1 and 1? OKay it has consistently created a difference of 12.5mm but how did it calculate this?

Many thanks in advance. Is there any way I could have just said initial = 50mm, lower = 45mm and upper = 55mm?

i am using HyperStudy with optistruct solver to do an optimization. Is there a possibility to change the number of cpu´s used by the solver?

thanksThomas

]]>14319Thu, 19 Feb 2015 12:07:42 +0000How can I define the displacement of a temp node as response in hyperstudy?http://forum.altairhyperworks.com/index.php?/topic/21995-how-can-i-define-the-displacement-of-a-temp-node-as-response-in-hyperstudy/
Hi all,

In my simulation model, I use the Rbe3 element to connect a temp node to a shell mesh. The Force is adding on this temp node.

I can check the displacement of this temp node with id in hyperview. Now I would like to define the displacement of this temp node as response in hyperstudy, but it does not work. I could only choose grid nodes. Anybody has ideas?

We have a batch process which calls a tcl file and the we read outputs.

The problem goes as follows:

In the batch process we need to know at which folders we are currently. When Hyperstudy runs the nominal run for instance, it creates folder

C:/Users/user1/Desktop/Gen02/approaches/nom_1/run__00001/m_1/

and copies there our .fem file (input)

In our batch we are using param %HST_APPROACH_RUN_PATH% to get the path of that folder. But we are getting the parent folder:

C:/Users/inasiopo/Desktop/Gen02/approaches/nom_1/run__00001

So .../m_1/ is missing!!!!

How can we get the correct path?

Hope we explain it in a good way.

Many thanks in advance

]]>21919Fri, 24 Nov 2017 09:57:41 +0000Import results from excel （warning）http://forum.altairhyperworks.com/index.php?/topic/21917-import-results-from-excel-%EF%BC%88warning%EF%BC%89/
I copy the response sheet from the excel based on tutorials HS-2000 in hyperstudy13, but a warning occurred , it displayed : wrong offset! Clipboard to wide (horizontal) to fit into the table. how do I solve it?

I tried the tutorial "HS-1545: DOE and Optimization Study with HyperMesh, HyperStudy, and ANSYS CFX" and it worked very well.

Now I want to use a .msh file instead of the model.cas file. I thought there should be no problem because it is also a fluent-file.

So I created a new study and went through the steps of the setup. When I reached the "evalute" step HS was able to write the Input files. But when HS wanted to execute it shows me always the attached picture.

Is it possible to change some terms in the responsible files to avoid this error? Or is it just impossible to use a .msh file?

I would like to optimize material cards for CFRP materials but for the solver Pam-Crash with an tensile test.
Can I use Hyperstudy with the input of a .pc file and can I tie-in the Pam-Crash solver or is there another opportunity to generate these cards in Hyperstudy for my solver?

Ann

]]>21610Thu, 19 Oct 2017 12:03:11 +0000parametric study of impact attenuatorhttp://forum.altairhyperworks.com/index.php?/topic/15698-parametric-study-of-impact-attenuator/i have to optimize the semi-apical angle of it. so it is defined in radioss. how i can define design variables in it.]]>15698Thu, 05 Nov 2015 04:26:48 +0000Material Law Characterization with RADIOSShttp://forum.altairhyperworks.com/index.php?/topic/19884-material-law-characterization-with-radioss/
Hello,

I am trying to use Hyperstudy to perform an inverse analysis to characterize a rubber. But in the tutorial (p367 attached pdf) I used, there is an .xy file required (Stress-Strain data points).

1. I am trying to do a DOE in Hyperstudy (2017) with ABAQUS (2017) as Solver. I created a new model, parametrized the XX.tpl file, registered the solver and typed XX.INP in solver input file field. The problem occured when i tried to define a response. I ran the simulation in Abaqus once to get the .odb file. I then put the file in 'approaches\nom_1\run__00001\m_1' to define responses. But when i tried to drag the file into the work area, it says 'file not recognized by Hyperstudy reader' and Hyperstudy text extractor gets selected. Please help me with this problem.

2. Is it possible to do DOE for physical experiments (i.e. without creating an expression for evaluating responses from Design variables) ?

I'm working on a coupled optimisation with Ansys workbench, I've achieved succesfully the coupling with Ansys 16, but when i try to do the otpimisation with Ansys 17 hyperstudy doesn't import my design variables.

I develop in my society the correlation between experimental test and numerical model. I want to use HyperWorks for this.

I see that it's possible (and easy) to build a MAC matrix between results. But I would like to know if it's possible next to do an automatic update of the model ?

If I have a bad correlation between results, is it possible to choose several parameters in my model (material properties, geometry structure, stiffness, mass, etc.), and perform an automatic optimization of this parameters for find a new model which will have a good correlation with experimental results ?

I would like to know if a module of HyperWorks allows this or we can just see the correlation between results with MAC matrix.

Thank you for your help,

Quentin

]]>19298Wed, 01 Mar 2017 13:24:08 +0000Hyperstudy simulation of three point bendinghttp://forum.altairhyperworks.com/index.php?/topic/19161-hyperstudy-simulation-of-three-point-bending/
Hi, I have produced a model of a composite plate undergoing three point bending and have imported this into hyperstudy to show the relationship between force and displacement. When setting up in hyperstudy I was prompted with this but I don't understand what the value N5561 refers to? I don't know what N value for request I should choose from to get the correct value as I want to find the displacement in the middle of the composite where the load acts? Any help would be great.

I am trying to utilize hyperstudy to optimize a bespoke shell section Beam. Essentially the beam is a hollow I-section but we would like to use hyperstudy to parameterize the thickness. Is this possible? The solver we are using is Optistruct.

I want to investigate some structures, that consist of many cells with the same geometry. I would like to define the number of these cells as parameter for my study with HyperSudy. It is also important that cells must be connected to each other.

I am trying to match the experimental results of tensile tests conducted on soft tissues with the developed user material in Ls dyna FEA code. I am creating my objective function in four responses. In response 1, i am creating two vectors v_1 and v_2 which defines the experimental time and measured force and in response 2(r_2) is defined by two vectors v_3 and v_4 through a csv file created during the simulation run. In response r_1 and r_2, i am using linear interpolations operations as, for example for one of the tests, linint( v_1, v_2, 0:6.99:0.005), here 6.99 is the total time of the event, 0.005 test frequency and for response r_2 it is linint(v_3, v_4, 0:6.99:0.005), hyperstudy is not able to extract the values and showing me a warning that non-scalar values cannot be used. Response 3 is created as 100*(r_1 - r_2)/max(r_1) and response r_4 as mag(r_3)/sqrt(v_1 or v_2) as both v_1 and v_2 are of same lengths. I am running this using genetic algorithm. Though iterations are running but value of objective functions which is min(r_4) remains the same. Kindly please help me out in resolving this issues out. The pics are attached for references.